Detail Cantuman

The efficiency of composting method with yard waste and rumen residue amendments to
reduce soil pollution by total petroleum hydrocarbon in Wonocolo public oilfields was
investigated in the laboratory scale for 150 days. Crude oil contaminated soil was mixed
with yard waste and rumen residue mixture at 1:1 ratio then composted in 2 replicates.
Pure crude oil contaminated soil was composted in parallel. The results showed that total
petroleum hydrocarbon degradation efficiency of soils amended with yard waste and
rumen residue mixture was 31 times higher than contaminated soil, which fulfilled the
soil quality standard (6,974.58 mg/kg). The degradation of total petroleum hydrocarbon
might be performed by Bacillus sp., and Bacillus cereus as the dominant bacteria at the
end of composting process. These results showed that yard waste and rumen residue
transformation could accelerate the degradation of aliphatic and aromatic fractions of
petroleum hydrocarbon in crude oil contaminated soil. Both of these wastes are generally
easy to obtain around Wonocolo public oilfield and highly recommended to use as the
main substrate in the composting process.
KEYWORDS
Petroleum hydrocarbon degradation, Composting, Bacillus sp., Bacillus cereus,
Wonocolo public oilfields.